AT89S8252-24AC Atmel, AT89S8252-24AC Datasheet - Page 35

• Manufacturer Part Number: AT89S8252-24AC
• Description: MCU W/SPI 8KB FLSH 2K EEP 44TQFP
• Manufacturer: Atmel
• Series: 89Sr

Specifications of AT89S8252-24AC

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: SPI, UART/USART
• Peripherals: POR, WDT
• Number Of I /o: 32
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -
• Other names: AT89S825224AC

Serial Port Timing: Shift Register Mode Test Conditions
The values in this table are valid for V
Shift Register Mode Timing Waveforms
AC Testing Input/Output Waveforms
Note:
Float Waveforms
Note:
0401G–MICRO–3/06
Symbol
t
t
t
t
t
XLXL
QVXH
XHQX
XHDX
XHDV
1. AC Inputs during testing are driven at V
1. For timing purposes, a port pin is no longer floating when a 100 mV change from load voltage occurs. A port pin begins to
for a logic 1 and 0.45V for a logic 0. Timing measurements are made at V
float when a 100 mV change from the loaded V
Parameter
Serial Port Clock Cycle Time
Output Data Setup to Clock Rising Edge
Output Data Hold after Clock Rising Edge
Input Data Hold after Clock Rising Edge
Clock Rising Edge to Input Data Valid
(1)
CC
= 4.0V to 6V and Load Capacitance = 80 pF.
CC
- 0.5V
OH
(1)
/V
OL
level occurs.
IH
min. for a logic 1 and V
10t
2t
CLCL
12t
CLCL
Min
Variable Oscillator
0
CLCL
- 117
- 133
10t
IL
AT89S8252
CLCL
max. for a logic 0.
Max
- 133
Units
µs
ns
ns
ns
ns
35